Combination bit and reamer.



No.-700,430. Patented May 20, |902. G. A. LANE.

COMBINATION BIT AND BEAMER.-

(Application led Sept. 30, 1901.)

(No Model.)

To ctZZ whom t Concern:

GEORGE ALLENLANE; OE LAKEsIDE, CALIFORNIA, `AssIGNoR OE ONE-1V l UNITEDv STATES I PATENT-QFFI'CE0-w f lHALE To .IosEPIIE MARTIN,oFLAfKEsIDE,l CALIFORNIA.

COMBINATION BIT 'AanA REAMIER.-

w sPEoIFIcATIoN forming partof Letters Patentflvo. redfiegames May 2o, A190:2. y

' Application tied september so.' 1901. serial 110.77.100. (No modem y yBe it knownthat I, GEORGE ALLEN LANE,

a citizen of the United States,residing at Lakeside,county of San Diego, State of California,

v have invented an Improvement inOoInbination Bits and Rea-mers; and I hereby'declare I the following to be afull, clear, an/d exact de- *well-boring tools.

scrip't'ion of the same. A

My Invention relates to improvements in ream out the well below the casing at the same time the bore'of the well is advanced and which drill can also he withdrawn through the casing. The invention consists of the parts and the constructions and combinations of parts hereinafter described and claimed. g f

Figure lis a vertical section through a well, showing the boring-tool. Fig. 2 is a view of the lower portion of the bit; Fig. 3 is a bottom view of the bit. p n

A represents a wellcasing of any desired diameter, in which the drill-rod 2, carrying the drill B, operates. The drill consists of a fiat bar of steel, having a reduced shank portion 3, adapted to be secured'in the box 4 on the'end of the drill-rod. The drill is made with one edge 5 approximately parallel with 7 of the drill would in itsrevolution about said axis describe an are of. greater radius than one-half the drill width. The lower or cutting end of the drill is inclined downwardly from the bottom of the edge 5 to the toe-point,

' so that the outline of the drill is suggestive the drill.

Its Objectis to provide a drill for Ilse `in oil and other wells which will i bevel of the face 9 extends between :and rearl, t" 5o ward ofthe centerof the grooves, s'o 'that between the vgrooves the face `9 presents a nar-z I row cutting edge. The'grooves actaspasvsage-ways for the mud and fluid displaced by the falling drill. y The boring 'and reaming are done entirely by the facefand the toe-'point 7, while the flat' heel -portion 8 actsfon the thick iiuid and mud as the bit is dropped to l i forcethe lon gcutting-point against the wall,

and` thus to cut the hole as therod is revolved l veected by reason lof having the point of at-v tachment of the bit or drill with the rod off thecenter of the body of the drill and on the side of the center opposite from the toe-point.

The bit may be removed from the ,well at any time by simply withdrawing the rod upon which it is secured. The toe portionof the bit strikes the lower edge of the casing and causes the bit, whose width is less than the interior diameter` of the casing, to slide up into the casing. K

Having thus described my invention, what I claim, and desire to' secure by Letters Patent, is- Y A drill consisting of a body portion having `its lower end inclined in :relation-to the axis of said body, the rear portion of said end surface being planeto form an inclined iiat heel, andthe forward or toe portion of this same inclined lower surface ofthe vdrillhaving oppositely-beveled surfaces forming a cutting and rearward of the centerof the grooves,`

substantiallyas herein described.

In witness whereof I have hereuntoset my hand.

` l' GEORGE ALLEN LANE.

Witnesses:

J. F. MARTIN, M. A. MARTIN. 

